Combined work-holder and drill



(No Model.)

J. A. OHABOT & J. JACOBS. COMBINED WORK HOLDER AND DRILL.

No. 475,664. Patented May 24, 1892..

JOSEPH A. OHABOT, OF SOMERVILLE, AND JOSEPH JACOBS, OF BOSTON,

' MASSACHUSETTS.

COMBINED \NORK-HOLDER AND DRILL.

SPECIFICATION forming part of Letters Patent No. 475,664, dated May 24,1892.

Application filed June 3, 1889. Serial No. 312,953. (No model.)

To all whom it may concern.-

Be it known that we, JOSEPH A. OHABOT, of Somerville, in the county ofMiddlesex, and JOSEPH JACOBS, of Boston, in the county of Suffolk, Stateof Massachusetts, have invented a certain new and useful Improvement ina Combined WVork-Holder and Drill, of which the following is a full,clear, and exact description.

This invention, in substance, consists of a portable work-holder to holdand center the work and clamp it on its opposite sides and a portabledrill to drill the work held by the work-holder and having means tooperate the drill, in combination with appliances in part held on thework-holder and in part on the support for the drill and constructed tobe detaehably secured together, and thereby to attach the work-holderand drill, and all so as to present the work and drill to each other infixed relations and such that on then suitably operating the drill thework as centered is drilled, so that the work-holder and drill, with itsoperating mechanism, are readily attachable and detachable,substantially as herein-' after described.

I11 the drawing forming part of this specification a combinedwork-holder and drill substantially of this invention is illustrated,and the figure is a plan view with some portions in central section.

In the drawing, A is a piece of work held on its opposite sides betweentwo sets of opposed jaws B and B each carried by separate blocks 0 0arranged to slide along a slotted bar D common to both and to beoperated by a commonscrew-threaded rod E, which at its opposite endportions is screw'threaded in opposite directions and turns in and isheld against lengthwise movement through fixed ear-pieces F at oppositeends of the bar D. Otherwise than as above particularly eX- plained theseveral parts are as shown and described in Letters Patent of the UnitedStates No. 390,658, dated October 9, 1888, on improved centering-gage,to which reference is hereby had, and all so that turning the screw-rodE in one direction closes the jaws 011 and in the other direction opensthem from the work, and at the same time in closing centering theworkthat is, bringing it to a given and determined position relative tothe axis of a tubular nose-piece G, fixed by rivets or other suitablefastening devices (not shown) or otherwise suitably on the slotted bar Dand across at right angles to the axis of the operatin g screw-rod E.

H is a drill secured in any suitable manner at the end of operating rodor shaft J, arranged to be rotated by bevel gear-wheels K K driventhrough a winch-handle L, attached to the shaft M of the gear-wheel K ordirectly through a ratchet-wheel N, secured to the shaft J, and a pawlO, engaging said ratchet and carried by a winch-handle P, fulcrumed onthe shaft J, and while being so rotated to be fed forward as desired bysuitably turning a feed-screw shaft Q, which surrounds and abuts againsta shoulder R of the drillshaft J and engages a screw-threaded nut S ofthe supporting-frame T for the mechanism described. Otherwise than asabove particularly explained the several parts are all as shown anddescribed in Letters Patent of the United States No. 68,827, datedSeptemberlO, 1867, on improved drill, to which reference is hereby had.

Neither the work-holder nor the drill described forms of itself any partof this invention, and the invention is in no manner to be limited toeither or to both, as it consists neither in the work-holder nor in thedrill of itself, but only in means held in part on the one and in parton the other, whereby the drilling mechanism is made attachable to anddetachable from the mechanism of the work-holder, and when attachedallows the work held and centered by the work-holder to be drilled bythe drilling-tool of the drilling mechanism, suitablyoperated therefor.Asparticularlyshown, these means consist of the tubularnose-piece G ofthe work-holder and of a tubular nose-piece U, which concentricallysurrounds the drill and its operating-shaft and is immovably held on thecarrier or supportT for the drill-operating mechanism and has a boresuitable to receive the nose-piece G of the work-holder, which in turnhas a bore suitable for the working of the drill and its shaft, as hasbeen particularly described. The nose-piece G of work-holder beinginserted in nose-piece U of drill mechanism, the nose-pieces arefastened 2 eraeoa together by a set-screw V or other means suitabletherefor, and thus, as is plain, the workholder and drill are attached,and all in a manner for the work to be drilled by the drill and for theholder and drill to be readily detached from each other.

The combined work-holder and drill of this -invention and which has beendescribed is most particularly useful for centering and drilling work atits opposite ends and so preparing it to be subsequently secured andcentered to be turned, .and considering the invention in this relationthe work-holder and drill particularly shown and described are mostserviceable and advantageous.

The nose of the drill and nose of the workholder may be adapted to bescrewed one to the other and the work-holder and drill so attached; orthey may be adapted to be joined by what is known as a union coupling orconnection, or otherwise, in any well-known manner, and the invention,broadly considered, is not to be limited in this relation.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

A combined work-holder and drill composed of opposed jaws B Bslide-blocks C 0 carrying said jaws, a slotted bar D, 011 which saidblocks slide, a screw-threaded rod E, suitably held on said bar andadapted to operate said blocks in opposite directions, and a tubularnose-piece G. held on said bar, in combination with a drill I-I, turningin suitable bearings, one of which is adapted to be entered into andfastened on said nose-piece, and means adapted to rotate said drill, allas described, for the purposes specified.

In testimony whereof we have hereunto set our hands in the presence oftwo subscribing witnesses.

JOSEPH A. CIIABOT. JOSEPH JACOBS. Witnesses:

ALBERT W. BROWN, HENRY F. MCKEEVER.

